在风洞试验同步测压的基础上,拟合了越南广宁体育场悬挑屋盖脉动风压自谱和相干函数经验表达式,采用准确的屋盖随机风振计算方法分析了上、下风向下悬挑屋盖结构的风致动力响应,重点分析了竖向动位移根方差响应随参振振型数的变化,研究了多振型和振型交叉项对其响应的影响规律。研究表明,越南广宁体育场双侧悬挑屋盖可只考虑前5阶振型,无需考虑振型交叉项的影响。 Based on the synchronous pressure measurement in the wind tunnel test, the empirical expressions of the fluctuating wind pressure spectrum and the coherence function of the cantilevered roof of Quang Ninh Stadium in Vietnam were fitted. The exact wind-roof vibration calculation method was used to analyze the wind-up and down-wind direction The dynamic response of the cantilevered roof structure under wind loads is analyzed. The variation of the root mean square response of the vertical moving root with the number of modes is analyzed, and the effect of the cross terms of the modes and mode shapes on the response is studied. The research shows that the double-sided cantilevered roof of Quang Ninh Stadium in Vietnam can only consider the first 5 modes, without considering the influence of modal cross terms.